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30 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is a comparison microscope? |
A device used to compare things side by side. |
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What is mass spectrometry? |
Mass spectrometry can identify elements and the relative ratios if isotopes. |
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What distinctive features do forensic scientists look for in bullets? |
- Length of bullet - Shape and weight - Rilfling marks - Patterns etc |
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What distinctive features do forensic scientists look for in seeds? |
Size of the seed Colour Shape Type |
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What are polarising microscopes used for? |
Fibres and soil |
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What two farming methods are there? |
Intensive farming and organic farming. |
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What reduces the rate of photosynthesis (limiting factors)? |
Light intensity Temperature Carbon dioxide |
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What food products are made using microorganisms? |
Yogurt and cheese (bacteria) Bread (yeast) Wine and beer (yeast) |
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How do plants make their own food? |
Photosynthesis Carbon dioxide + water > glucose + oxygen
6CO2 + 6H2O > C6H12O6 + 6O2 |
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How can farmers reduce the number of pests? |
Organic farming: biological predators (ladybirds to eat aphids) Intensive farming: pesticides (chemicals which kill pests) |
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What happens to the rate of photosynthesis as carbon dioxide levels increase? |
It increases (until a point) |
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How do farmers reduce photosynthesis limiting factors? |
Plants are grown using artificial lights, in warm conditions and with paraffin lamps inside greenhouses (which release carbon dioxide) |
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What are electron microscopes used for? |
Paint and pollen grains - they can magnify up to a million times |
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What are antagonistic muscles? |
Antagonistic muscles work in pairs - when one muscle contracts the other relaxes. E.g. The biceps and triceps |
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How how can muscle strenth be measured? |
A grip test can be used to measure muscle strenth. |
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What type of foods are essential to optimise athletic performance? |
Carbohydrates Proteins Fats Vitamins Minerals Water |
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Explain the following types of data: a) Categoric b) Continuous c) Discrete d) Ordered |
Categoric: can fall into groups (e.g. Boys and girls) Continuous: can be any value (e.g. 4.776 seconds) - time, weight, distance etc... Discrete: whole numbers only (e.g number of people/ layers) Ordered: not number, but can be ranked (e.g. Small, medium, large) |
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What is an isotonic sports drink? |
They replace water, glucose and electrolytes into the blood, which can be lost during strenuous exercise. |
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What is the respiratory system and what does it contain? |
It contains the organs which allow us to get oxygen to the cells (and remove carbon dioxide) |
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Why are instrumental techniques used? |
They provide precise and reliable evidence than those from laboratory experiments |
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What are the main parts of an animal cell and what are their functions? |
Nucleus: controls what happens in the cell. Cell membrane: controls what substances can enter and exit the cell Cytoplasm: where chemical reactions take place. |
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What is infra-red spectrometry? |
It can determine molecular structure and identify an organic compound |
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What is and independent variable? |
A variable that can be changed. |
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What is a systematic error? How could you spot one? |
Data that is all shifted in the same direction. |
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What does the body do if there is too much blood glucose? |
Insulin is added |
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What is the job of the veing and how are the adapted to perform this? |
Veins are thin walled cartying blood back to the heart (they also have valves to stop the backflow of blood) |
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What is contained in blood? |
Blood plasma Red blood cells White blood cells Platelets |
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What can affect the position of the equilibrium? |
Temerature Concentration (pressure in gas reactions) |
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What are catalysts? |
They increase the rate of reaction without being used up, e.g. Soap powder/ enzymes |
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What are the pros/ cons of genetic engineering? |
Pros: Reduce impact of genetic diseases Improve plant growth Improve resistance to disease Longer shelf-life food Ripening of fruit can be changed World hunger soloution
Cons: Playing 'God' It might not work ( waste of money) Genes could spread to the wild Designer babies Effects are not yet known (long term) Reduces the gene pool |
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